Q&A Forums
Estimating pitched roofs Post New Topic | Post Reply
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John Ferguson
Posted: Jan 29, 2008 09:52 PM
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Estimating pitched roofs
Do any of you contractors have any formulas on determining total sq ft for various pitched roofs???
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Tim O'Keefe
Posted: Jan 29, 2008 10:18 PM
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When possible, I measure the length of the room. Then to determine the length of the rafter I count the sheets of plywood. 1 sheet is 4 feet. If it is 5.5 sheets from the eave to the ridge that is 22 feet. Simple and effective. Tim Granite State Spray Foam Co. |
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Edward Brassington
Posted: Jan 30, 2008 12:08 AM
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If you know the pitch of the roof use the following chart Pitch Multiply Flat Area By 3/12x1.031 4/12x1.054 5/12x1.083 6/12x1.118 7/12 x.158 8/12x1.202 9/12x1.250 10/12x1.302 11/12x1.357 12/12x1.413 I hope this helps |
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Darren Gomez
Posted: Mar 12, 2008 02:35 AM
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I use this online calculator. It's found at: http://www.inspectusa.com/info/calc/roof-flatwork/roofcalc.htm You'll need the length width and height from the rafters to the highest point of the pitch. |
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philip mullins
Posted: Mar 13, 2008 10:00 PM
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post ur email addy and i will send you some good info and charts along with 1 chart that is just the rite size to be taped to ur clip board. |
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Rob Granger
Posted: Mar 13, 2008 10:40 PM
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Troutkiller, Would you send me the same info. Thanks Much!!!! rgranger at localnet com |
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William Gibson
Posted: Mar 15, 2008 11:23 AM
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Troutkiller - Could you please send to aispeedway@gmail.com? Thanks |
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Darren Gomez
Posted: Mar 30, 2008 09:17 PM
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I'll take that too if your offering. dgomez@lahsllc.com |
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philip mullins
Posted: Mar 30, 2008 09:30 PM
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sry guys. been kinda crazy round here lately. i will have my wife get those out to you guys asap. |
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D. Backes
Posted: Mar 30, 2008 10:59 PM
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Hey Troutkiller, If you show me yours I'll show you mine! foamfiend@hotmail.com Thank You in advance. BigD |
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Circle-D
Posted: Jun 11, 2009 12:40 PM
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Ed does this chart work on hip roofs also, Thanks |
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SPFer
Posted: Jun 14, 2009 08:15 AM
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Hip roofs are easy, length of room X length of rafter X 2. You don't need to worry about the triangles. |
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Corey Degetaire
Posted: Jun 27, 2009 08:06 PM
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I use a digital laser range finder, to get measurements in hard to reach areas (attics) It is a great tool and sure beats a tape measure. You can pick them up for about $150. |
